Conversion of emulsion mud to cement

Details Conversion of emulsion mud to cement Conversion of emulsion mud to cement

1994-02-14

1994-10-25

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166292, 175 65, 507140, E21B 3314

Patent

active

053580494

ABSTRACT:
A wellbore is drilled utilizing an oil-in-water emulsion drilling fluid, optionally containing blast furnace slag. A compatible cementitious slurry containing blast furnace slag and an activator system is then introduced into the borehole and displaced up into an annulus. Generally, the cementitious slurry is prepared by adding additional blast furnace slag and an activator such as a sodium hydroxide/sodium carbonate mixture to the used drilling fluid.

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